forensics labs

1) what role do multiple observations/ experiments play in making good inferences and conclusions in each case?

because in forensics you want to be sure about your results, so just one test will not tell you for sure if you are right or not. So if you do multiple test you can compare them all to see exactly what the answer is.

2) when is it hard to be precise and how does this affect the confidence in your results? what did you do about this?

It is hard to be precise when things happen like if you don't have the right amount materials or if you don't have the right materials, then your data that you collect will be wrong. or if you measure something wrong it will affect your results so you have to be very careful.when this happens you have to either start all over or try to fix you mistake because you still want to be accurate.

3)when can you rely on "known" data to match up with and when do you need to generate your own? what is the difference?
when you are not sure if your data is correct or if the data given is right then you have to go further in your research. But if you know your data that you were given is correct then you can rely on that you don't ave to go any further in your reaserch.